Barite high-purification production line and production process

Abstract

The invention relates to the technical field of nonmetallic mineral product manufacturing, in particular to the technical field of sulfate production, and particularly relates to a barite high-purification production line and a barite high-purification production process. The barite high-purification production line comprises a grinding device, a vibrating screen is arranged at the outlet end of the grinding device, and a mixing device is arranged at the outlet of the vibrating screen; a filter is arranged at the outlet end of the mixing device to filter a mixture, the filtered material enters a first rinsing device to be rinsed with first rinsing liquid, the solid material passing through the first rinsing device enters a smashing device to be smashed, and a screen body is arranged on the smashing device to screen the particle size of the solid material; a second rinsing device is arranged at the lower end of the smashing device. The method comprises the following steps: grinding and screening barite, mixing with HF and hydrogen peroxide to preliminarily remove impurities, then carrying out primary rinsing and secondary rinsing on the filtered material, removing main aluminum-containing and iron-containing impurities in the barite through the primary rinsing, carrying out particle size treatment and continuously removing impurities through the secondary rinsing, and carrying out secondary rinsing. And the reaction process is controlled through online particle size detection and a purification structure, so that barite crystal grains with the purity and the particle size meeting the requirements can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of non-metallic mineral product manufacturing and intelligent online detection, specifically to the technical field of sulfate production, and specifically to a high-purification and purification production line and production process of barite. Background Art

[0002] The barite used in my country's industry is mainly a primary product. A large amount of it is used as a weighting agent for oil well mud, and a small amount is used to produce a series of barium salt chemical products. For example, the production of precipitated barium sulfate is to use barite (the main component is also barium sulfate BaSO4) to add carbon to high temperature to reduce it to barium sulfide, and then react with sodium sulfate to produce barium sulfate. The main component of natural barite is barium sulfate (BaSO4), and the content is not low, which can reach more than 95%. However, due to the presence of colorants, the color of barite is poor and the whiteness is insufficient. Generally, users who use barium sulfate or barite have high requirements for whiteness indicators. Therefore, a high-purification and purification process of barite is proposed to solve the above problems.

[0003] According to different uses, barium sulfate can be divided into two categories. One is industrial barium sulfate, which is widely used as a filler in coatings, papermaking, rubber, ink, plastics and other fields. The quality standard is GB / T2899-2017, and the core indicators are whiteness and fineness; the other is reagent barium sulfate, which is used as a gastrointestinal contrast agent in radiological examinations; barium sulfate is added to electronic products to effectively absorb X-rays generated under high voltage current, so barite is often used as a material for radiation-resistant plates; in the battery industry, it is used as a cathode expander for batteries. These fields not only require excellent physical properties of barium sulfate, but also emphasize chemical purity, implement reagent standards HG / T3033-2011 or higher than the reagent standards, and control the dissolved matter and acid-soluble barium salts in the acid. There is less research in this direction. In actual production, it is mainly solved by controlling low synthesis concentration and slow synthesis speed, which has a great impact on the efficiency and cost of industrial production. Regardless of the need, high-purity barium sulfate, that is, barite, is required.

[0004] Normally, the smaller the barite particle size, the more conducive it is to increasing the contact opportunity of the reaction materials, making the leaching speed faster. However, too fine a material will cause the porosity of the entire reaction material to be small, which in turn reduces the contact area with water and is not conducive to leaching. However, in the production of radiation protection panels, the particle size needs to be as low as possible to increase the density of the panels. Therefore, high-purity and appropriate particle size are important technical indicators for expanding the application range of barite.

[0005] After barite is purified, it is combined with mica functional filler and other non-metallic minerals such as barium carbonate and barium titanate and rolled into anti-radiation plates that can effectively block rays. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a high-purification production line and production process for barite to obtain barite grains suitable for use in various scenarios.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A high-purification and purification production line for barite, the production line comprises a grinding device, the grinding device is used to grind barite to obtain barite powder, a vibrating screen is provided at the outlet end of the grinding device, a mixing device is provided at the outlet of the vibrating screen, the mixing device is used to mix the barite powder with a first component liquid to form a mixture, a filter is provided at the outlet end of the mixing device to filter the mixture, the filtered material enters a first rinsing device and is rinsed with a first rinsing liquid, the solid material after the first rinsing device enters a pulverizing device to be pulverized, a sieve body is provided on the pulverizing device to screen the particle size of the solid material, a second rinsing device is provided at the lower end of the pulverizing device, and the solid material after the particle size is screened is rinsed with a second rinsing liquid in the second rinsing device to obtain purified barite.

[0008] The first component liquid is citric acid and hydrogen peroxide; The first rinse liquid added is hydrochloric acid, the pH of the rinse liquid after adding hydrochloric acid is 3-4, and a mixture of yeast glucan and chitosan in a mass ratio of 1:2 is added at a volume percentage of 2.5‰ of the filtrate; The second rinsing liquid added is liquid ammonia.

[0009] The mixing device, the first rinsing device and the second rinsing device are provided with heaters to control the reaction temperature.

[0010] The above-mentioned crushing device includes a crushing roller located at the top, an obliquely arranged oblique vibrating screen is provided at the bottom of the crushing roller, the pipe below the oblique vibrating screen is closed and located above the second rinsing device, a lifting pipe is provided at the oblique end of the oblique vibrating screen, and a recovery lifting pump is provided in the lifting pipe to lift the screened material back to the top of the crushing roller.

[0011] The above-mentioned second rinsing device is a rotatable rinsing device. An online sampling and detection device is provided on one side of the second rinsing device to perform online detection on the particle size and purity of the barite in the second rinsing device. The second rinsing device determines the program control of the second rinsing according to the result of the online detection.

[0012] The above-mentioned online sampling and detection device comprises a sampling mechanical arm arranged beside the second rinsing device, a sampling bucket is arranged at the end of the sampling mechanical arm, a plurality of holes are arranged on the sampling bucket for liquid discharge, and a membrane body is arranged in the sampling bucket for only allowing liquid to be discharged; There are two workstations next to the sampling robot arm, one of which is equipped with an online detection device for barite particle size, and the other is equipped with a mass spectrometer.

[0013] The above-mentioned online detection device for barite particle size includes a conveying device, on which a glass display platform with multiple workstations is evenly distributed, a light source is provided in the conveying device, and an image capturing device facing the glass display platform is provided above the conveying device opposite to the light source. The image capturing device captures the image of barite on the glass display platform and determines whether the particle size meets the requirements through image processing.

[0014] The glass display platform is provided with a vibration device, which is used to evenly disperse the barite sample onto the glass display platform; A cleaning brush is provided at the glass display platform station on one side of the conveying device, and a collection box is provided below the cleaning brush; The second rinsing device is provided with a liquid ammonia adding pipe, which is divided into a rotatably connected fixed pipe and a self-rotating pipe body.

[0015] The first rinsing device and the second rinsing device are provided with a rotating rinsing drum, and the rinsing drum is provided with evenly distributed through holes; The tail liquid from the first rinsing device and the second rinsing device enters the tail water mixing tank for mixing.

[0016] A high-purification production process for barite, the purification production steps are: S1: barite grinding and screening: the barite is ground in a grinding device, and the barite is screened in a vibrating screen after the grinding to obtain barite powder; S2: Mixing treatment: adding the obtained barite powder into a mixing device, and sequentially adding the first component liquid, i.e., citric acid and hydrogen peroxide, into the mixing device, starting the mixing device, mixing the materials to obtain a mixture; S3: Filtration: Filter the obtained mixture using a filter, remove the filter membrane and collect the material on the filter membrane; S4: First rinsing of materials: The collected materials are subjected to a first rinsing treatment in a first rinsing device. During the rinsing process, HCl is added to the rinsing liquid so that the pH of the rinsing liquid is 3-4, and the rinsing is performed to obtain a first rinsing residue and a first rinsing liquid; S5: pulverizing the rinse residue: adding the first rinse residue into a pulverizer for pulverization to obtain a pulverized product; S6: Second rinsing of the material: The crushed material is subjected to a second rinsing treatment to obtain a second rinsing residue and a second rinsing liquid; S7: Drying of the crushed material: Add the second rinsed residue into an oven for drying to obtain a highly purified barite product.

[0017] Preferably, in the first rinsing process of step S4, the rinsing liquid is water, and a mixture of yeast glucan and chitosan in a mass ratio of 1:(1.5-2.5) is added to the rinsing liquid at a volume percentage of 2.5-3.5‰ of the rinsing liquid, and the rinsing is performed at 40-45°C for 1.5-1.8 h.

[0018] Preferably, during the second rinsing treatment in step S6, dispersant liquid ammonia is added; further preferably, the prepared barium sulfate solution is heated, the barium carbonate solution is heated to boiling within 25-35 minutes, kept boiling for 10-30 minutes, and then cooled to 44-51°C. Preferably, the first rinsing liquid and the second rinsing liquid are mixed in the tail water mixing box 12, and the pH of the whole solution is adjusted to 7-8 by liquid ammonia. The filtered water after the precipitation filtration under flocculation is used as the mixing water in step S2, thereby reducing the water consumption in the process.

[0019] The invention provides a high-purification and purification production line and production process of barite. The barite is ground and screened and then mixed with HF and hydrogen peroxide to preliminarily remove impurities. The filtered material is then rinsed once and twice. The primary rinse removes the main aluminum-containing and iron-containing impurities in the barite. The secondary rinse is used to process the particle size and continue to remove impurities. The reaction process is controlled by online detection of the particle size and the purification structure, so that barite grains with purity and particle size that meet the requirements can be obtained.

[0020] During the second rinsing process, liquid ammonia is added as a dispersant, which is easily adsorbed on the surface of the powder, reducing the adsorption force of the powder surface and allowing the barium sulfate to form a suitable particle size; the prepared barium sulfate solution is heated at a later stage to remove the impurities of ammonium salts that may be introduced into the reaction system due to the addition of liquid ammonia, and the ammonium ions are heated and decomposed and discharged, which will not affect the purity of the barium sulfate. The first rinsing liquid and the second rinsing liquid are mixed and treated, and the pH of the entire solution is adjusted to pH 7-8 by liquid ammonia. The filtered water after the precipitation under flocculation is filtered is used as the mixing water in step S2, thereby reducing the water consumption in the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the layout of the barite purification production line of the present invention; Figure 2 This is a partial schematic diagram of the barite purification production line; Figure 3 It is a partial schematic diagram of the barite purification production line of the preferred solution; Figure 4 It is a top view schematic diagram of an online sampling and detection device; Figure 5It is a schematic diagram of the structure of the crushing device and the second rinsing device; Figure 6 This is a schematic diagram of the structure of the sampling robotic arm.

[0022] In the figure: grinding device 1, vibrating screen 2, mixing device 3, heater 4, HF and hydrogen peroxide addition tube 5, filter 6, first rinsing device 7, rinsing hydrochloric acid addition tube 8, crushing device 9, crushing roller 91, oblique vibrating screen 92, recovery lifting pump 93, lifting pipeline 94, second rinsing device 10, liquid ammonia addition tube 11, fixed tube 111, self-rotating tube body 112, tail water mixing box 12, sampling robot arm 13, sampling bucket 131, barite particle size online detection device 14, conveying device 141, glass display platform 142, image capture device 143, light source 144, cleaning brush 145, collection box 146, mass spectrometer 15, rinsing drum 16. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following content will systematically and completely describe the specific technical solutions of the present invention in combination with the drawings provided according to the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1-6 As shown in, a high-purity purification production line of barite, the production line includes a grinding device 1, the grinding device 1 is used to grind barite to obtain barite powder, a vibrating screen 2 is provided at the outlet of the grinding device 1, and a mixing device 3 is provided at the outlet of the vibrating screen 2, the mixing device 3 is used to mix the barite powder with a first component liquid to form a mixture, and a filter 6 is provided at the outlet of the mixing device 3 to filter the mixture, the filtered material enters the first rinsing device 7 and is rinsed with the first rinsing liquid, the solid material after the first rinsing device 7 enters the crushing device 9 for crushing, the crushing device 9 is provided with a sieve body to screen the particle size of the solid material, and the lower end of the crushing device 9 is provided with a second rinsing device 10, and the solid material after the particle size is screened is rinsed with the second rinsing liquid in the second rinsing device 10 to obtain purified barite.

[0025] The first component liquid is citric acid and hydrogen peroxide; The first rinse liquid added is hydrochloric acid, the pH of the rinse liquid after adding hydrochloric acid is 3-4, and a mixture of yeast glucan and chitosan in a mass ratio of 1:2 is added at a volume percentage of 2.5‰ of the filtrate; The second rinsing liquid added is liquid ammonia.

[0026] The mixing device 3, the first rinsing device 7 and the second rinsing device 10 are provided with a heater 4 to control the reaction temperature.

[0027] The above-mentioned crushing device 9 includes a crushing roller 91 located at the top, and an obliquely arranged oblique vibrating screen 92 is provided at the bottom of the crushing roller 91. After the pipe below the oblique vibrating screen 92 is closed, it is located above the second rinsing device 10. A lifting pipe 94 is provided at the oblique end of the oblique vibrating screen 92. A recovery lifting pump 93 is provided in the lifting pipe 94 to lift the screened material back to the top of the crushing roller 91.

[0028] The oblique vibrating screen 92 is provided with sieve holes of set particle size. Barite materials that meet the particle size fall into the second rinsing device 10 for rinsing, and those that do not meet the particle size are transported back to the crushing roller 91 by the recovery lift pump 93 for secondary crushing. The connection end of the lifting pipe 94 and the oblique vibrating screen 92 has an oblique downward pipe, and the recovery lift pump 93 is arranged at the corner of the oblique downward pipe, so that materials with unqualified particle sizes can be accumulated at the recovery lift pump 93 for centralized recovery and processing. The recovery lift pump 93 is turned on at a fixed time to avoid being turned on all the time to repeatedly crush materials with qualified particle sizes.

[0029] The above-mentioned second rinsing device 10 is a rotatable rinsing device. An online sampling and detection device is provided on one side of the second rinsing device 10 to perform online detection on the particle size and purity of the barite in the second rinsing device 10. The second rinsing device 10 determines the program control of the second rinsing according to the result of the online detection.

[0030] The second rinsing device 10 is configured as a rotatable device to facilitate sampling, material pouring and tail liquid discharge.

[0031] The above-mentioned online sampling and detection device includes a sampling mechanical arm 13 arranged beside the second rinsing device 10, and a sampling bucket 131 is arranged at the end of the sampling mechanical arm 13. The sampling bucket 131 is provided with a plurality of holes for liquid discharge, and a membrane body that only allows liquid to be discharged is arranged in the sampling bucket 131; Two workstations are arranged beside the sampling mechanical arm 13 , one of which is provided with an online detection device 14 for the particle size of barite, and the other is provided with a mass spectrometer 15 .

[0032] The sampling robot arm 13 digs out the barite sample from the second rinsing device 10, and can control the robot arm to generate shaking to discharge the liquid from the permeable membrane body through the hole body, and then stand still to wait for the liquid to be drained. After the liquid is drained, the sample can be transferred to the barite particle size online detection device 14 and the mass spectrometer 15 for detection. The barite particle size online detection device 14 is used to detect the barite particle size in the second rinsing device 10, and the mass spectrometer 15 is used to detect the impurity content in the barite particles, that is, the purification effect is detected. The rinsing process control of the second rinsing device 10 is determined by the particle size and the purification result, such as increasing the time and number of the second rinse.

[0033] The above-mentioned barite particle size online detection device 14 includes a conveying device 141, on which a glass display platform 142 with multiple workstations is evenly distributed, a light source 144 is provided in the conveying device 141, and an image capturing device 143 facing the glass display platform 142 is provided above the conveying device 141 opposite to the light source 144. The image capturing device 143 captures the image of barite on the glass display platform 142 and determines whether the particle size meets the requirements through image processing.

[0034] The glass display platform 142 is provided with a vibration device, which is used to evenly disperse the barite sample on the glass display platform 142, and spread the sample through the conduction of vibration; A cleaning brush 145 is provided at the glass display platform 142 on one side of the conveying device 141, and a collection box 146 is provided below the cleaning brush 145; The second rinsing device 10 is provided with a liquid ammonia adding pipe 11, which is divided into a rotatably connected fixed pipe 111 and a self-rotating tube body 112. The self-rotating tube body 112 rotates to the top of the second rinsing device 10 when addition is required, and rotates to the other side when the second rinsing device 10 is rotated and tilted for sampling or pouring out materials, which can prevent interference between devices.

[0035] The first rinsing device 7 and the second rinsing device 10 are provided with a rotating rinsing drum 16, and the rinsing drum 16 is provided with evenly distributed through holes; The tail liquids from the first rinsing device 7 and the second rinsing device 10 enter the tail water mixing tank 12 for mixing.

[0036] A high-purification production process for barite, the purification production steps are: S1: Grinding and screening barite: Grinding the barite in a grinding device 1, and screening the barite after grinding, in a vibrating screen 2, to obtain barite powder; S2: Mixing treatment: adding the obtained barite powder to the mixing device 3, and sequentially adding the first component liquid, i.e., citric acid and hydrogen peroxide, to the mixing device 3, starting the mixing device 3, mixing the materials to obtain a mixture; S3: Filtration: Filter the obtained mixture using filter 6, remove the filter membrane and collect the material on the filter membrane; S4: First rinsing of the material: The collected material is subjected to a first rinsing treatment in the first rinsing device 7. During the rinsing process, HCl is added to the rinsing liquid so that the pH of the rinsing liquid is 3-4, and the rinsing is performed to obtain a first rinsing residue and a first rinsing liquid; S5: pulverizing the rinsed residue: adding the first rinsed residue to a pulverizer 9 for pulverization to obtain a pulverized product; S6: Second rinsing of the material: The crushed material is subjected to a second rinsing treatment to obtain a second rinsing residue and a second rinsing liquid; S7: Drying of the crushed material: Add the second rinsed residue into an oven for drying to obtain a highly purified barite product.

[0037] Preferably, in the first rinsing process of step S4, the rinsing liquid is water, and a mixture of yeast glucan and chitosan in a mass ratio of 1:(1.5-2.5) is added to the rinsing liquid at a volume percentage of 2.5-3.5‰ of the rinsing liquid, and the rinsing is performed at 40-45°C for 1.5-1.8 h.

[0038] Preferably, during the second rinsing treatment, liquid ammonia as a dispersant is added with a mass fraction of 0.1-0.3%, which is easily adsorbed on the surface of the powder, thereby reducing the adsorption force of the powder surface, so that the barium sulfate can fully contact with the rinsing liquid to wash away impurities, and is not deposited together to be detrimental to rinsing; further preferably, the prepared barium sulfate solution is heated, the barium carbonate solution is heated to boiling within 25-35 minutes, kept boiling for 10 to 30 minutes, and then cooled to 44-51°C, so that the introduction of ammonium salt impurities in the reaction system due to the addition of liquid ammonia, the ammonium ions are heated and decomposed and discharged, and the purity of the barium sulfate is not affected. Preferably, the first rinsing liquid and the second rinsing liquid are mixed in the tail water mixing box 12, and the pH of the whole solution is adjusted to 7-8 by liquid ammonia. The filtered water after the precipitation filtration under flocculation is used as the mixing water in step S2, thereby reducing the water consumption in the process.

[0039] Preferably, in S1, the ground barite is sieved, and after the sieving is completed, the sieved material is repeatedly sieved 3 to 6 times.

[0040] Preferably, in S2, the temperature inside the mixer is set to 60 to 90° C., and the rotation speed inside the mixer is set to 80-120 r / min.

[0041] Preferably, in S2, the concentration of citric acid is 4%-9%, and the mass fraction of hydrogen peroxide is 13% to 15%.

[0042] Preferably, in S3, the mixture is filtered using a 200-mesh filter membrane, and after the filtration is completed, the filtrate is filtered repeatedly 2 to 5 times.

[0043] Preferably, in S4, the number of rinsing is 6 to 10 times.

[0044] Preferably, in S5, the temperature inside the pulverizer is set to 30 to 40° C., and the rotation speed inside the pulverizer is set to 120-180 r / min.

[0045] Preferably, in S7, the temperature of the oven is set to 80 to 90° C., and the drying time is set to 40 to 80 minutes.

[0046] The barite powder obtained by the present invention has a purity (BaSO4) of ≥99.2%, a whiteness of ≥96.8, and a particle size range of 1.31 to 1.42 μm.

[0047] Example 1 Based on the above production line, the specific process steps are as follows: S1: Grinding and screening barite: Grinding barite in a grinding device 1, and screening the barite after grinding, and screening in a vibrating screen 2 to obtain barite powder with a particle size of 10 to 30 mm; S2: Mixing treatment: adding the obtained barite powder to the mixing device 3, and sequentially adding the first component liquid, i.e., citric acid and hydrogen peroxide, to the mixing device 3, starting the mixing device 3, mixing the materials to obtain a mixture; S3: Filtration: The obtained mixture is filtered through a filter 6, and the filter membrane is removed to collect the material on the filter membrane; S4: First rinsing of the material: The collected material is subjected to a first rinsing treatment in the first rinsing device 7. During the rinsing process, HCl is added to the rinsing liquid so that the pH of the rinsing liquid is 3-4, and the rinsing is performed to obtain a first rinsing residue and a first rinsing liquid; S5: pulverizing the rinsed residue: adding the first rinsed residue to a pulverizer 9 for pulverization to obtain a pulverized product; S6: Second rinsing of the material: The crushed material is subjected to a second rinsing treatment to obtain a second rinsing residue and a second rinsing liquid; S7: Drying of the crushed material: Add the second rinsed residue into an oven for drying to obtain a highly purified barite product with a particle size of 1.31 to 1.42 μm.

[0048] Preferably, in the first rinsing process of step S4, the rinsing liquid is water, and a mixture of yeast glucan and chitosan in a mass ratio of 1:2 is added to the rinsing liquid at a volume percentage of 2.8‰ of the rinsing liquid, and the rinsing is performed at 43°C for 1.6 h.

[0049] Preferably, during the second rinsing treatment, liquid ammonia as a dispersant is added with a mass fraction of 0.15%; further preferably, the prepared barium sulfate solution is heated, the barium carbonate solution is heated to boiling within 30 minutes, kept boiling for 15 minutes, and then cooled to 48°C, so as to remove the impurities of ammonium salts that may be introduced into the reaction system due to the addition of liquid ammonia, and the ammonium ions are heated and decomposed and discharged. Preferably, the first rinse liquid and the second rinse liquid are mixed in the tail water mixing box 12, and the pH of the entire solution is adjusted to 7.5 by liquid ammonia. This is because chitosan is in a dissolved state under the acidic conditions of the first rinse liquid, and after mixing with the second rinse liquid and adjusting to alkalinity, the filtered water after the precipitation under flocculation is used as the mixing water in step S2, reducing the amount of water used in the process.

[0050] Preferably, in S1, the ground barite is sieved, and after the sieving is completed, the sieved material is repeatedly sieved 5 times.

[0051] Preferably, in S2, the temperature inside the mixer is set to 70° C., and the rotation speed inside the mixer is set to 100 r / min.

[0052] Preferably, in S2, the concentration of citric acid is 5% and the mass fraction of hydrogen peroxide is 14%.

[0053] Preferably, in S3, the mixture is filtered using a 200-mesh filter membrane, and after the filtration is completed, the filtrate is filtered repeatedly 4 times.

[0054] Preferably, in S4, the number of rinsing is 8 times.

[0055] Preferably, in S5, the temperature inside the pulverizer is set to 35° C., and the rotation speed inside the pulverizer is set to 150 r / min.

[0056] Preferably, in S7, the temperature of the oven is set to 85° C., and the drying time is set to 60 minutes.

[0057] The barite powder obtained in this example has a purity (BaSO4) of 99.2%, a whiteness of 97.2, and a particle size range of 1.31 to 1.42 μm.

Claims

1. A barite high-purification purification production line, characterized in that, The production line comprises a grinding device (1), the grinding device (1) being used for grinding barite to obtain barite powder, a vibrating screen (2) being provided at the outlet end of the grinding device (1), a mixing device (3) being provided at the outlet of the vibrating screen (2), the mixing device (3) being used for mixing the barite powder with a first component liquid to form a mixture, a filter (6) being provided at the outlet end of the mixing device (3) to filter the mixture, the filtered material entering a first rinsing device (7) to be rinsed with a first rinsing liquid, the solid material after the first rinsing device (7) entering a pulverizing device (9) to be pulverized, a sieve body being provided on the pulverizing device (9) to screen the particle size of the solid material, a second rinsing device (10) being provided at the lower end of the pulverizing device (9), the solid material after the particle size screening being rinsed with a second rinsing liquid in the second rinsing device (10) to obtain purified barite, and an online sampling and detection device being provided on one side of the second rinsing device (10).

2. According to a barite high-purification purification production line described in claim 1, it is characterized in that, The first component liquid is citric acid and hydrogen peroxide; The first rinsing liquid added is hydrochloric acid; The second rinsing liquid added is liquid ammonia.

3. According to a barite high-purification purification production line described in claim 2, it is characterized in that, The mixing device (3), the first rinsing device (7) and the second rinsing device (10) are provided with heaters (4) for controlling the reaction temperature.

4. According to a barite high-purification purification production line described in claim 3, it is characterized in that, The pulverizing device (9) comprises a pulverizing roller (91) located at the top, an obliquely arranged oblique vibrating screen (92) is provided at the bottom of the pulverizing roller (91), a pipe below the oblique vibrating screen (92) is closed and located above the second rinsing device (10), a lifting pipe (94) is provided at the oblique end of the oblique vibrating screen (92), and a recovery lifting pump (93) is provided in the lifting pipe (94) to lift the screened material back to the top of the pulverizing roller (91).

5. According to a barite high-purification purification production line described in claim 4, it is characterized in that, The second rinsing device (10) is a rotatable rinsing device, and the online sampling detection device performs online detection on the particle size and purity of the barite in the second rinsing device (10). The second rinsing device (10) determines the program control of the second rinsing according to the result of the online detection.

6. According to a barite high-purification purification production line described in claim 5, it is characterized in that, The online sampling detection device comprises a sampling mechanical arm (13) arranged next to the second rinsing device (10), a sampling bucket (131) is provided at the end of the sampling mechanical arm (13), a plurality of holes are provided on the sampling bucket (131) for liquid discharge, and a membrane is provided in the sampling bucket (131) for only allowing liquid to be discharged; Two workstations are arranged next to the sampling mechanical arm (13), one of which is provided with an online barite particle size detection device (14), and the other is provided with a mass spectrometer (15).

7. According to a barite high-purification purification production line described in claim 6, it is characterized in that, The barite particle size online detection device (14) comprises a conveying device (141), a glass display platform (142) with multiple workstations evenly distributed on the conveying device (141), a light source (144) is provided in the conveying device (141), and an image capture device (143) facing the glass display platform (142) is provided above the conveying device (141) directly opposite the light source (144). The image capture device (143) captures an image of the barite on the glass display platform (142) and determines whether the particle size meets the requirements through image processing.

8. According to a barite high-purification purification production line described in claim 7, it is characterized in that, The glass display platform (142) is provided with a vibration device, and the vibration device is used to evenly disperse the barite sample onto the glass display platform (142); A cleaning brush (145) is provided at the glass display platform (142) on one side of the conveying device (141), and a collection box (146) is provided below the cleaning brush (145); The second rinsing device (10) is provided with a liquid ammonia adding pipe (11), and the liquid ammonia adding pipe (11) is divided into a rotatably connected fixed pipe (111) and a self-rotating pipe body (112).

9. According to a barite high-purification purification production line described in claim 8, it is characterized in that, The first rinsing device (7) and the second rinsing device (10) are provided with a rotating rinsing drum (16), and the rinsing drum (16) is provided with evenly distributed through holes; The tail liquids from the first rinsing device (7) and the second rinsing device (10) enter the tail water mixing tank (12) for mixing.

10. A high-purification production process for barite, characterized in that: The production steps of purification are: S1: barite grinding and screening: the barite is ground in a grinding device (1), and after the grinding, the barite is screened in a vibrating screen (2) to obtain barite powder; S2: Mixing treatment: adding the obtained barite powder to a mixing device (3), and sequentially adding the first component liquid, i.e., citric acid and hydrogen peroxide, to the mixing device (3), starting the mixing device (3), and mixing the materials to obtain a mixture; S3: Filtration: Filter the obtained mixture using a filter (6), remove the filter membrane and collect the material on the filter membrane; S4: First rinsing of the material: The collected material is subjected to a first rinsing treatment in a first rinsing device (7). During the rinsing process, HCl is added to the rinsing liquid so that the pH of the rinsing liquid is 3-4, and the rinsing is performed to obtain a first rinsing residue and a first rinsing liquid; S5: pulverizing the rinsed residue: adding the first rinsed residue to a pulverizer (9) for pulverization to obtain a pulverized product; S6: Second rinsing of the material: The crushed material is subjected to a second rinsing treatment to obtain a second rinsing residue and a second rinsing liquid; S7: Drying of the crushed material: Add the second rinsed residue into an oven for drying to obtain a highly purified barite product.

Images